The text introduces the process control of culvert construction to ensure engineering quality.
介绍了涵洞施工的工序控制，以确保涵洞工程质量。
At the second part, the text introduces the concept, kind, purpose and function of the assets valuation standards.
第二部分介绍了资产评估准则的概念、性质、目的和作用。
The text introduces the design scheme and developing way of dual-channel virtual digital oscilloscope based on USB bus.
介绍了基于USB总线的双通道虚拟数字示波器的设计方案和开发方法。
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